DE1601628A1 - Streamlined shovel for flow machines e.g. for gas turbine engines - Google Patents

Description

Patent attorneys

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ROLLS-ROTCE LIMITED »Derby, Derbyshire, Great Britain

Stromliaienforisige shovel for flow machines e.g. IUr Gaatorbinei engines

The invention concerns! a streamlined blade for turbo machines · never for gas turbine engines, for example.

In the following description, the term "shovel" is included in the broadest sense also, for example, D-guide vanes.

The invention creates a streamlined blade for a turbo-engine, "· · for a gas turbine engine," dt an inner wall which is surrounded by an outer opening and separated from it by a thin space that lies on the opposite sides of the blade, the inner wall being Wall forms a chamber that receives a coolant, and at least one layer of this inner wall has a variety of holes through which solvent from this chamber can carbonize into the tree and the inner surface of the wall, whereby the suspended wall ends »8 has an opening through which the lüftljdttel can evolve from the tree« and where the shovel with at least «» fin «guiding ut ₉ durah which daa Ühlaittel, '"'"■;·" * "-ί> · λ -, Aiio - V- BAD ORIGINAL

000113/0817 "

that poured into the chamber, directly across the said barely can get to the outside of the blade without looking at the coolant mix in this room "

It can be seen that by means of the invention it is possible to cool essentially the entire fan side of the outer wall of the blade by jetting cooling air from this chamber, which can be done more effectively than was previously possible. In addition, the number of holes mentioned can be arranged in such a way »that the inside of the outer wall is adequately cooled» although the air flow in the room mentioned is not evenly distributed. Supply coolant to all parts. The arrangement of the holes can also be such that hmi & s® spots are compensated, while the arrangement of the holes over at least the larger part of the inner wall makes the position opposite the outer wall less critical than otherwise the case

Are di ·· * Locher, check derMlben preferably in at least · the Groasteil the Innenwandmf, both in the radial aid in aach d "r axial direction.

These punches can also include punches that are radial · Uhg · de · the gate edge of the shovel next to it « Part of the Xmenwandvng extend.

Tomgswei ·· is «look around radial iamen and mmam !!« send volumes of the Ihnesvaadang no «or only if«

Di · radial · Amsdebaang d «r Seh & ^ f ·! as ibste, mbrvswi & itrttfvu im · can wwietlid »frSa ^ rs« ln as an ihzm stri »abwtrti« en fisd «.

009813/0917

The space mentioned can extend up to the rear edge of the Sohaufsl Streoken, the outer wall with an opening or with openings in the rear edge is equipped «

The invention also includes an annular combustion chamber for a Gas turbine engine with a large number of extremely offset Nozzle guide vanes of the type described above

The radial expansion of the combustion chamber can be substantial in the middle be bigger than your bids. ·

Further characteristics and advantages of the invention emerge from the following description by way of example with the aid of the accompanying drawings. It shows"
1 shows a very similar, partially transverse representation of a gas turbine engine with DBsen-

guide vanes »
Fig. 2 is an enlarged cross-section of such a Duaenleit-

shovel and
FIG. 3 is a cross section taken along line 3-3 in FIG. 2.

Flg. 1 «eigt a quad turbine engine 10 with a compressor 11, a combustion chamber 12 and a turbine 13, which drives the compressor 11 and whose turbine exhaust gases are passed through an exhaust gas line 14 to the Outside air are released

The combustion chamber 12 is an annular combustion chamber in which to strosabwartiger On the half a multitude of angularly arranged ones DHsenleitschaufein 15 is foreseen »

Each such Dttsenleitseheufel 15 has an inner wall 16, "oak a chamber 17 forms. Di® chamber 17 is on its raäial outside

OO0813 / Q9T7

The lying end is supplied with a part of the tob compressor 11 compressed air, which serves as dilution air % vm , dilution of the combustion products, so that these can be fed to the turbine at a temperature-sensitive rate. In order to simplify the illustration in Fig. 1, the manner in which the dilution air enters the chamber 17 is not shown.

The inner wall 16 of each Dueenleitsohaufel 15 iet of one outer wall 20 surrounded. Between these walls 16 and 20 a room or a camera 21 is formed which look at the opposite Pages 22, 23 of the Dusenleitsohaufel and up to their Rear edge 24 extends.

A large part of the inner wall 16 is provided with a large number of holes 2 , through which evaporation air can flow from the chamber 17 into the space 21 in order to flow over and cool the inside of the outer wall 20. The air flowing through the holes 25 hits the outer wall 20 in the form of rays. At the rear edge 24, the outer wall 20 has one or more openings 26 through which the dilution air can escape from the space 21.

As can be seen, the holes 25 extend through a large part of the radial and axial length of the inner wall 16. These holes 25 also comprise a bttha of ridges 25a _t dft through the entire radial length of the part of the inner wall 16 adjacent to the leading edge 30 go through the Dttsenlelteohaafel so that this leading edge is also sufficiently cleared. Aa the radially inner and outer baths of the 3-stage wall 16 can be seen but what? very few holes 25.

009813/0917 ^ _BAD

Each DCteenlÄttBohaufel 15 i »t bit of a multitude of τοπ channels arranged at a radial distance from one another through which part of the evaporation calls enter the Kamw 17 directly across the room 21 on the outside of the DBaenlelt- • ohaufel can donate »without» I old the dilution air in building «21 tu vera & aohen *

The downstream edge of the inner wall 16 is in a similar abatand for the rear edge 24 and the flow line runs through the wall 21 atroBabwirta of the inner wall 16 is through inner baffles divided into three parts.

The radial muzzle of the furnace 12 is in the middle tvia the ends significantly larger than the ends, on the other hand the dehaenleitaohaufeln 15 eo are closed, so that their radial outlets are una ac their atreaic aids weaentlioh Larger aind al * the radial depressions on their downward load · The radially inneret lying part of the fiatow 21 therefore forms a low moocion in operation "the deep cooling of the icy part" of the inside of the iuateavanduag 20 l% ren "Krd" _t if the outer part of the inner huadvng 16 aioht old dan! seers 25 equipped we ·,

BATH

Claims (7)

A 1. \ tro «left Godfather ntiniprlohi Bromine-shaped blade for a turbomachine, see B. —For a gas turbine engine, with an inner wall made by surrounded by a outer wall and from this through a room is separated. which is on opposite sides of the bucket, wherein the inner wall forms a chamber receiving a coolant and at least a part of this wall forms a plurality of has holes through which coolant can flow from this chamber into the room and the inner surface of the outer wall can cool, the outer wall having at least one opening through which the coolant can escape from the tree «by the fact that the shovel with at least one Line (31) is equipped through which the coolant, the entered the chamber, immediately across! beg the named Space (21) on the outside of the shovel can enter without moving with the coolant in this tree (21) * u Tersdaehen. 2. Shovel near Jnaprueh 1, thereby recognizing that the XoOher lasts (25) see at least the cross part of the inner wall (16), both in the radial and in the axial direction of the same, are located" 3. Shovel according to claim 1 or 2, characterized in that the foils (25) include 25a), which see through the entire radial slope d »the front edge (30) of the shovel (15), part of the inner wall path (16 ) tretreekeB. 4 · Shovel according to vdnm the previous statement,! • refuses that "I am at the ndlml imm xmu " a U * & m '& i ftaden the inner wall foot (16) lc "ine or only a few iXotmv (25) are · 00981370917 ~ ⁷ ~ BATHROOM 5 * shovel according to one of the preceding claims, characterized in that the radial extension of the blade (15)
their “electricity consumption” is much greater than theirs
radial expansion at its lower edge. 6. Sbhaufel after a "K der ^ © rssgehiEden Ässpi-üch" ,, dadurcli
marked * that "the said exit (£ |) extends to the rear edge (24) of the shovel (15)," whether the outer wall (> 0) is equipped with an opening or with a nipple (26) in the rear edge (24) « 7. Streamlined blade according to one of the preceding claims, characterized by the fact that this blade is used as a nozzle guide vane (15) A gas turbine engine (10) is arranged in an annular BreenkaeBer (12) 8 «StroKlisiienfBflläig · Shovel according to claim 7 and claim 5,
-. dadfertih gekeanseis & dassidle net _p "· Sshaufel 1st arranged in a Brennkasffler (12) (15), dereo dimension ia the middle is much larger than m its two ends, BATH ORIGINAL 13/0917 -: ■: ■ · ". '.' . '■■' ■■■? '■■■■■ ^; ' Lea rs ei te